Transcript Slide 1

Chemistry for Changing Times, 11th edition
John W. Hill and Doris K. Kolb
Chapter 3
Atomic Structure: Images of the
Invisible
James A. Noblet
California State University
San Bernardino, CA
 2007 Prentice Hall
Experiments by J.J. Thomson showed that cathode rays
are composed of what elementary particles?
1.
2.
3.
4.
Protons
Electrons
Neutrons
Alpha
particles
5. Positrons
Experiments by J.J. Thomson showed that cathode rays
are composed of what elementary particles?
1.
2.
3.
4.
Protons
Electrons
Neutrons
Alpha
particles
5. Positrons
A helium nucleus that is emitted during some
radioactive decay processes is also called a(n):
1.
2.
3.
4.
5.
Alpha particle
Beta particle
Gamma particle
Delta particle
Sigma particle
A helium nucleus that is emitted during some
radioactive decay processes is also called a(n):
1.
2.
3.
4.
5.
Alpha particle
Beta particle
Gamma particle
Delta particle
Sigma particle
Which of these electronic transitions would result in the
emission of visible light (where n=energy level)?
1.
2.
3.
4.
5.
n=5 to n=2
n=2 to n=5
n=3 to n=1
n=7 to n=3
n=4 to n=1
Which of these electronic transitions would result in the
emission of visible light (where n=energy level)?
1.
2.
3.
4.
5.
n=5 to n=2
n=2 to n=5
n=3 to n=1
n=7 to n=3
n=4 to n=1
Isotopes are elements that differ only in their:
1. Atomic number
2. Nuclear charge
3. Number of electrons in
the neutral atom
4. Atomic mass
5. Chemical properties
Isotopes are elements that differ only in their:
1. Atomic number
2. Nuclear charge
3. Number of electrons in
the neutral atom
4. Atomic mass
5. Chemical properties
Elements in the same group of the periodic table
exhibit what tendency?
1.
2.
3.
4.
5.
Similar chemical properties and reactivity
The same total number of electrons
Similar atomic masses
Similar appearance and physical properties
Different numbers of valence electrons
Elements in the same group of the periodic table
exhibit what tendency?
1.
2.
3.
4.
5.
Similar chemical properties and reactivity
The same total number of electrons
Similar atomic masses
Similar appearance and physical properties
Different numbers of valence electrons